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¡¡¡¡1£© My train arrives in New York at eight o'clock tonight. The plane I would like to take from there ___ by then.£¨1999.1£©
¡¡¡¡A. would leave ¡¡¡¡B. will have left ¡¡¡¡C. has left ¡¡¡¡D. had left
¡¡¡¡2£© She ought to stop work£» she has a headache because she ____ too long.£¨2000.1£©
¡¡¡¡A. has been reading ¡¡¡¡B. had read ¡¡¡¡C. is reading ¡¡¡¡D. read
¡¡¡¡3£© ¡°May I speak to your manager Mr. Williams at five o'clock tonight£¿¡±£¨2000.6£©
¡¡¡¡¡°I'm sorry. Mr. Williams ____ to a conference long before then.¡±
¡¡¡¡A. will have gone ¡¡¡¡B. had gone ¡¡¡¡C. would have gone ¡¡¡¡D. has gone
¡¡¡¡4£© Great as Newton was£¬ many of his ideas _____today and are being modified by the work of scientists of our time.£¨1997.1£©
¡¡¡¡A. are to challenge ¡¡¡¡B. may be challenged ¡¡¡¡C. have been challenged ¡¡¡¡D. are challenged
¡¡¡¡5£© Before the first non-stop flight made in 1949£¬ it ____ necessary for all planes to land for refueling. £¨1996.6£©
¡¡¡¡A. would be ¡¡¡¡B. has been ¡¡¡¡C. had been ¡¡¡¡D. would have been
¡¡¡¡6£© He came back late£¬ ____ which time all the guest had already left.£¨1999.6£©
¡¡¡¡A. after ¡¡¡¡B. by ¡¡¡¡C. at ¡¡¡¡D. during
¡¡¡¡7£© Until then£¬ his family ______from him for six months. £¨1997.1£©
¡¡¡¡A. didn't hear ¡¡¡¡B. hasn't been hearing ¡¡¡¡C. hasn't heard ¡¡¡¡D. hadn't heard
¡¡¡¡Explanation and Expansion
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¡¡¡¡It's reported that by the end of the month the output of cement in the factory ____ about 10%.
¡¡¡¡A. will have risen B. has risen
¡¡¡¡C. will be rising D. has been rising
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¡¡¡¡By the time we got there£¬ the fire had already been put out.
¡¡¡¡We'll have completed the task by the time you come back.
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¡¡¡¡The conference ____ a full week by the time it ends
¡¡¡¡A. must have lasted
¡¡¡¡B. will have lasted
¡¡¡¡C. would last
¡¡¡¡D. has lasted £¨1997.1£©
¡¡¡¡It seems oil ___ form this pipe for some time. We'll have to take the machine apart to put it right.
¡¡¡¡A. had leaked
¡¡¡¡B. is leaking
¡¡¡¡C. leaked
¡¡¡¡D. has been leaking £¨1997.6£©
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¡¡¡¡By then£¬ he knew what he waned to be when he grew up.
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